Worldwide Shipping Available Orders are processed within 1–3 business days and shipping costs are calculated at checkout. Tracking information will be sent once your order has been dispatched.
Estimated Shipping Times Estimated delivery times vary by destination:
USA & Canada: 7–12 business days
Germany & UK: 3–9 business days
Europe: 5–12 business days
Asia Pacific: 10–20 business days
Australia: 8–15 business days
Typical delivery times are 3–12 business days, depending on the destination. Please note that actual delivery times may vary due to customs, carrier delays, or peak shipping periods.
Shipping Protection Shop with confidence — every order is covered by shipping protection from dispatch to delivery. In the event of loss or theft, we offer a full refund or complimentary reshipment.
Shop with confidence — we offer a 30-day money-back guarantee and accept returns within 30 days after delivery for eligible items that are unused, in their original packaging, with tags attached. If your item arrives damaged, defective, or incorrect, please contact us and we’ll work with you to make it right.
For quality-related issues or shipping mistakes on our side, we’ll cover the return shipping cost. Approved refunds are issued to your original payment method within 1–3 business days after inspection.
The Q.Mark Crest Navy Blue Zip Up Jacket brings a vintage athletic aesthetic to your daily rotation. Crafted from 100% cotton, this navy blue zip up jacket carries a washed-down finish that gives it an effortlessly worn-in character. Light blue contrast stripes run along both shoulders and sleeves, adding a classic sporty edge without overpowering the clean silhouette.
Distinctive Details That Set It Apart
A bold heraldic crest graphic sits on the left chest, featuring an eagle motif in a shield design with four stars above — a refined nod to football culture and old-school sportswear. The back is equally considered, printed with the number 01, a script Q.Mark logo, and a cross-flag emblem inspired by classic international team kits. A high ribbed collar, full metal zip closure, ribbed cuffs, and a ribbed hem round out the construction for a structured yet comfortable fit.
How to Style It
Wear it over a plain white tee with straight-leg trousers for a smart-casual look, or layer it under a heavier coat during cooler months. The muted navy wash pairs easily with earth tones, greys, and black. Available in sizes M through XL — see the size guide below for chest and sleeve measurements before ordering.
Size Guide
Size
Length (in)
Chest (in)
Sleeve (in)
Shoulder (in)
M
27 ½
48 ⅞
22 ⅞
22 ⅞
L
28 ⅜
50 ⅜
23 ¼
23 ¼
XL
29 ⅛
52
23 ⅝
23 ⅝
How to Find Your Perfect Size — Every Time
How to Find Your Perfect Size — Every Time
Struggling to pick a size online? Here's a simple trick: instead of guessing, use a piece of clothing you already own — and love the fit of — as your reference point.
Step 1: Pick Your Reference Item Think of a T-shirt you've bought before that fit you perfectly. Find that order and pull up its size chart.
Step 2: Focus on Two Key Measurements For streetwear-style tees, two numbers matter most:
Chest width— too narrow and it'll feel tight
Length— too long and it'll look sloppy
💡 Tip:Size charts sometimes list "Chest" as theflat-lay widthinstead of the full circumference. Here's how to tell the difference:
Large number(e.g., 49in / 124cm+) → likely the actual chest circumference
Small number(e.g., 24in / 62cm) → likely the flat width (garment laid flat and measured edge to edge)
Step 3: Note Your Ideal Numbers Write down the chest and length measurements from your best-fitting shirt. Care about sleeve length or shoulder width too? Note those down as well.
Step 4: Match to Our Size Chart Now check Seakoff's size chart and pick the size whose measurements are closest to your notes. That's it — no more guessing.
Works for Everything This same method applies to hoodies, sweaters, jackets, and more. Do it once, and you'll be able to shop confidently, anywhere — every time.
